Cop skewer for automatically replenishing shuttles



May 22, 1928. 1,671,067

' H. A. DAVIS GOP SKEWER FOR AUTOMATICALLY REPLENISHING SHUTTLES Filed May 14, 1927 I lI-llllllHH Illllllll ATTORNEY Patented May 22, 1928.

UNITED STATES PATENT 3 OFFICE.

-HARRY A. DAVIS, 01? HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORA TION, 0F HQPEIDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

COP SKEWER FOR AUTOMATICALLY REPLEN ISHIN G SHUTTLES.

Application filed May 14, 1927. Serial No. 131,499.

This invention relates to thread carrier supports for automatically replenishing shuttles and is more-particularly directed to cop skewers for holding wound cops in the shuttle during weaving. I

Cop skewers are now ordinarily formed as solid spindles having cop retaining features, or as a split spindle. In the latter type of cop skewers, the two members of the split spindle are normally expanded or bowed and when introduced into the cop are liable to displace the inner windings of the cop, with the result that in approaching depletion of the cop during weaving, thread breakage and yarn wastageare liable to occur. times to remove the cop from the cop spindle, and where this is attempted with the split skewer as heretoforeemployed, the

interior windings of the wound cop are displaced sometimes to such an extent as to render the cop unfit for further use.

During the weaving operation the cop is liable to be displaced upon the skewer by reason of the shocksto which the shuttle 1S repeatedly subjected either by the picker stick or as it enters the shuttle box. Such displacement of the cop on the skewer is obviously objectionable and may at times cause destruction or partial destruction of the cop itself, breakage of the filling, and interfere materially with the continuous weaving operatic Cops are ,now usually wound uponsmall paper cop tubes, so that as thecop is placed upon the skewer, the interior windings are liable to displacement, especially at that portion of the cop which isnot protected-by the small paper cop tube. In such cases, also, removal of the cop from the skewer is almost certain to displace the interior windings to such an extent as to make the cop unfit for further use.

An important feature of the present invention therefore consists of a cop skewer having resilient bowed members, each of which is provided with. cop retaining shonlders formed as spirals at the same angular relation to the longitudinal axis of the skewer, to thereby engage the interior wind- .ings of the wound cop and retain it securely inplace on the skewer during weaving, and yet provide for removal of the cop from the skewer by an unscrewing inovement which On the other hand, it is desirable at ing shoulder of one spiral on each ofthe resilient members to the bottom ofthe next adjacent spiral on that member, in order that the cop and skewer may be assembled together by direct longitudinal movement of the cop and skewer relatively without displacing the interior windings oi the cop. v

The invention and new features thereof Fig. 3 is a side elevation of the c op skewer showing one of the exterior faces ofa resihent'member, and'by dotted lines indicat-' mg the cop in place on the skewer; and

F g. 4 is an enlarged sectional view on the line Hot Fig. 3. j i

The filling resplenishing shuttle l may be of usual character provided with the bobbin chamber and having at its l'ront-end portion a threading device 2. At t-heopposite end the shuttle is provided with the usual holding jaws 3 adapted to receive and hold the cop skewer. i

The cop skewer has a head portion t which may be provided with the usual holding rings 5 for engagement with the bobbin holding jaws 3 of the shuttle, the constriuj:-- tion being such that on replenishment of filling the incoming filling carrier may eject tip end of the skewer, the construction being such that as the cop skewer and cop are assembled, the resilient members 8 may yield lois inwardly to accommodate the size of the cop skewer to the internal diameter of'the wound cop, and by their resiliency engage the interior windings of the cop to maintain-it on the cop skewer during weaving.

As indicated in the drawings, the Wound cop 9 is initially wound upon a short paper tube 10 which extends only part way into one end of the wound cop, so that the remaining winds at the interior of the wound cop are unprotected and engage the resilient members 8 of the skewer when the skewer and cop are assembled. 'From the construction thus far described it will be apparent that the interior windings of the cop 9 constitute the sole means throughout the greater portion of the cop for holding the cop upon the skewer, and while the resiliency of the cop members 8 will assist in maintaining the cop upon the skewer during weaving, the recurrent shocks to which the shuttle is subjected are liable to displace the cop upon the skewer and cause the defects hereinbefore referred to.

In accordance with the present invention, each of the bowed or resilient members 8 of the cop skewer is provided with a series of cop holding shoulders formed by complimental spirals on each of said resilient or bowed members 8, with the result that a screw formation is provided of the same pitch on each, of the resilient members. Each of the resilient members 8 is further .provided with inclined surfaces which extend from the top portionof each of the cop. holding shoulders in. the bowed or resilient members to the bottom of the next spiralor cop holding shoulders. The result is that the cop skewer and wound cop may be assembled by relative longitudinal movement without disturbing the interior windings of the cop whiehpass along the inclines hereinbefore described and then successively over the shoulders of the two resilient membersuntil the cop and skewer are in their working positions.

More specifically stated, the two resilient or bowed members 8 of the cop skewer are provided with the cop holding shoulders 13 formed on a complemental spiral, indicated at c--d, Fig. 2, to produce a screw eflect of the same pitch on the two resilient members, and in substantial continuation, so that upon removal of the wound cop from the cop skewer, a. relative unscrewing action between the two will permit them to be separated without disturbance of the interior windings 11 of the wound cop.

Extending between the top of the cop holding shoulders or spirals 13 and the bot tom of the next adjacent cop holding shoulders or spirals 13, each of the resilient members 8 is provided with uninterrupted inelines 12 which permit the cop skewer and wound cop to be assembled by longitudinal movement without material disturbance of cop holding shoulders or spirals 13 on each of the resilient members 8 should not pre sent projections at the edge portions of the resilient members which might disturb the interior windings of thecop during application or removal of the cop upon or from the skewer, and to this end the shoulders or spirals 13 are formed to extend part way across the resilient men'ibers with terminal portions merging gradually to the surface otthe resilient members adjacent the side edges thereof with the result thatno abrupt projections are presented to the interior windings of the cop calculated to, disturb such winding as the cop and skewer are assembled or disassembled. I i In thepreterred form of the invention the cop holding shoulders or spirals 13 are of varying depth transversely of the resilient members 8, as indicated in Fig. 4,.wherein it will be noted that the terminal portions 15 ot the shoulders orspirals are of less depth than the centralportions and gradually merge into the surface of the resilient members, thus forming a smooth edge 16 at each side of the resilient members which'permit the cop to be placed upon the skewer by relative longitudinal movement and to be re 'Ii'lOVGd therefromby a relative unscrewing movement without materially disturbingthe interior windings of the cop.

Similarly the inclines 12 are of varying depth between the top of the shoulder 13 interior windings of the cop remainundisturbed. y

When the wound cop-9 and the cop skewer 7 are to be assembled, they are movedlongitudinallyrelative to each other, and when the inclines 12 meet the interior windin s 11 of the wound cop, such interionwin in gs will be gradually pushed outwardly, as in dicated in F ig. 1, without, however, disturbing their wound relation, and when the wound cop and co skewer have thus' been assembled the shou ders 13 sink into the 'interior windings 11 of the wound cop and securely maintain the wound cop 011 the skewer during weaving.

Should it be desired to removethewound co from the cop skewer at anytime, it is on y necessary to relatively turn the wound cop and skewer in,an unscrewing direction, whereupon the complemental s iral formation 13 constituting the cop ho lding shoulders will act upon the interior windings of the cop substantially simli'ar to the ac tion of screw-threaded parts, without, at the sameltime, disturbing the relative wound condition of the cop. Thusa wound'eop and skewer formed in accordance with the present invention may be assembled by relative longitudinal movement without disturbing the windings of the cop itself and may be disassembled by an unscrewing relative movement without disturbing the interior windings of the cop, so that the wound cop may be placed upon and removed from the skewer a number .of times and yet preserve its wound and undisturbed condition.

It will be understood, of course, that the wound cop 9 is produced by windings, which are generally indicated by the line ab of Fig. 3, and as the skewer and cop are given a relative unscrewing movement, the screwlike spiral formation of the cop holding shoulders 13 which are complemental will act upon the interior windings 11 in a man ner as indicated in Fig. 3, to pass over a number of such windings in a screw-like manner without disturbing the individual windings themselves.

What is claimed is:

1. A cop skewer comprising resilient members the surface of each of which is provided with spiral cop retaining shoulders of varying depth transversely of the resilient .members, the terminal portions of said spiral cop retaining shoulders gradually merging into the surface of the resilient members adjacent the edges thereof to offer no obstruction to the application of the cop to the skewer by relative longitudinal move ment and the removal of the cop from the skewer by a relative unscrewing movement.

2. A cop skewer comprising resilient bowed members each of which is provided with spiral grooves of varying depth forming complemental spiral cop holding shoulders on each of said bowed members, the terminal portions of said spirals being of less depth than. the intermediate portion to provide smooth unshouldered edges to the bowed members, and inclines of varying depth transversely of the bowed members and extending from the top of one spiral to the bottom of the next adjacent spiral.

3. A cop skewer comprising a tapered split spindle formed of two resilient bowed members each of which is provided with spiral grooves complement-a1 to the other to form a screw thread in the outer bowed faces of the split spindle of gradually decreasing depth adjacent the side edges of the bowed members and having holding shoulders formed with inclined surfaces that slope continuously from the crest of one shoulder to v the base of the next shoulder that the cop skewer may be introduced into the cop by relative longitudinal movement and removed therefrom by a relative unscrewing movement.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS. 

